Search

Search Results

• 11. [Image] Bull Trout, Salvelinus Confluentus... Draft Recovery Plan, Chapter 2, Klamath River Recovery Unit...U.S. Department Of The Interior

  	KLAMATH RIVER RECOVERY UNIT CHAPTER OF THE BULL TROUT RECOVERY PLAN EXECUTIVE SUMMARY CURRENT SPECIES STATUS Klamath River bull trout were listed as a distinct population segment ...
  	Citation × Citation Citation Abstract Copy Title: Bull Trout, Salvelinus Confluentus... Draft Recovery Plan, Chapter 2, Klamath River Recovery Unit...U.S. Department Of The Interior Year: 2008, 2005 KLAMATH RIVER RECOVERY UNIT CHAPTER OF THE BULL TROUT RECOVERY PLAN EXECUTIVE SUMMARY CURRENT SPECIES STATUS Klamath River bull trout were listed as a distinct population segment in 1998 (63 FR 31647) because they are physically isolated from other bull trout by the Pacific Ocean and several small mountain ranges in central Oregon. Recovery of bull trout in the Klamath River Recovery Unit, which includes three core areas and nine currently identified local populations, will require cooperation from Federal, State, and local agencies, and Tribal and private entities. Within the Klamath River Recovery Unit, abundance has been severely reduced and remaining populations are fragmented. HABITAT REQUIREMENTS AND LIMITING FACTORS Watershed disruption has played a major role in the decline of bull trout in the Klamath River basin. The effects of historical land use on fish habitat in the larger tributaries and mainstem rivers of the Klamath River basin have been profound. Channelization, water withdrawals, removal of streamside vegetation, and other disturbances have altered the aquatic environment by elevating water temperatures, reducing water quantity and quality, and increasing sedimentation. Changes in or disruptions to watershed processes that influence characteristics of stream channels have also influenced the dynamics and persistence of bull trout populations. Klamath River basin bull trout are threatened by habitat degradation, past and present land use management practices, agricultural water diversions, and competition or hybridization from normative brown and brook trout. As a result of past land and resource management practices, bull trout populations in the Klamath River Recovery Unit are small, disjunct, and face a high risk of extirpation. IV RECOVERY GOAL AND OBJECTIVES The goal of the bull trout recovery plan is to ensure the long-term persistence of self-sustaining, complex interacting groups of bull trout distributed across the species range, so that the species can be delisted. In order to recover bull trout in the Klamath River, the following objectives need to be met: ? Maintain current distribution of bull trout and restore distribution in previously occupied areas within the Klamath River Recovery Unit, as noted in Appendix A. ? Maintain stable or increasing trends in abundance of bull trout within the Klamath River. This objective includes the expression of all life history strategies including resident, fluvial, and adfluvial forms in the Upper Klamath Lake core area and resident and fluvial forms in the Sycan River and Upper Sprague River core areas. ? Restore and maintain suitable habitat conditions for all bull trout life history stages and strategies. In core areas and migration corridors, stable or upward trends in habitat quality are achieved through landscape-level adjustments in land management strategies designed to maintain and/or enhance structural and functional attributes of upslope, riparian, and fluvial systems. ? Conserve genetic diversity and provide opportunity for interchange of genetic material among appropriate core populations. RECOVERY CRITERIA Recovery criteria for the Klamath River Recovery Unit reflect the stated objectives and consideration of population and habitat characteristics within the recovery unit. Using four population and habitat elements, the Klamath River Recovery Unit Team categorized bull trout into three groups of relative risk: diminished, intermediate, and increased. Team members evaluated bull trout under current and potential recovered conditions based on the number of local populations, adult abundance, population trends and variability, and connectivity of the system. These elements were derived from the best scientific information available concerning bull trout population and habitat requirements. Evaluation of these elements under a recovered condition assumed that actions identified within this chapter had been implemented. 1. Distribution criteria will be met when current distribution of bull trout in the 12 local populations is maintained and distribution is expanded by establishing bull trout in areas identified as suitable for potential local populations. The number of existing local populations by core area are as follows: Upper Klamath Lake, 3; Sycan River, 2; and Upper Sprague River, 7. Achieving criterion 1 entails maintaining existing local populations and establishing additional potential local populations in all core areas in the recovery unit to maintain current and recovered distribution. To achieve criterion 1 and to ensure a core area population of no fewer than 100 adult bull trout, establishing at least 5 to 7 local populations in the Klamath Lake core area among 15 potential local populations (2 to 5 new local populations), at least 5 to 7 local populations in the Sycan River core area from among 15 potential local populations (3 to 5 new local populations), and at least 10 to 12 local populations in the Upper Sprague River core area from among 25 potential local populations (3 to 5 new local populations) is necessary. 2. Abundance criteria will be met when the estimated number of adult bull trout is at least 8,250 individuals distributed among the Upper Klamath Lake, Sycan River, and Upper Sprague River core areas, based on 10 years of monitoring data. 3. Trend criteria will be met when adult bull trout exhibit stable or increasing trends in abundance in the Upper Klamath Lake, Sycan River, and Upper Sprague River core areas, based on 2 generations (10 years) of monitoring data. VI 4. Connectivity criteria will be met when specific barriers to bull trout migration in the Klamath River Recovery Unit have been addressed. In the Klamath River Recovery Unit, this objective means addressing passage: 1) existing culverts that impede passage should be replaced, including those on Threemile Creek at U.S. Forest Service Road 110 crossing, Brownsworth Creek at U.S. Forest Service Road 34 crossing, and Brownsworth Creek both 0.75 mile and 1.25 miles above U.S. Forest Service Road 34; the culvert 0.25 mile below U.S. Forest Service Road 34 (to prevent repeated washout); the large-diameter culvert at the Boulder Creek road crossing; culverts in the upper Sycan River watershed that are identified in the Fremont National Forest inventory; and several in the North Fork Sprague River drainage, namely, on North Fork Sprague River (2), Boulder Creek (1), Dead Cow Creek (1), and Sheepy Creek (1); 2) fish passage structures should be installed at water diversions on bull trout streams, and barriers should be removed, including on Cherry, Sevenmile, Sun, and Threemile Creeks; 3) fish screens should be installed to prevent fish from entering diversion canals or pipes, including on Long, Deming, Threemile, Sun, Sevenmile, and Cherry Creeks; 4) manmade barriers and entrainment should be evaluated and remedied to promote migratory bull trout; priority watersheds include Threemile, Long, Deming, Sevenmile, Cherry, Sun, and Long Creeks. The Klamath River Recovery Unit team expects that the recovery process will be dynamic and will be refined as more information becomes available. Future adaptive management will play a major role in recovery implementation and refinement of recovery criteria. The recovery unit criteria listed above will be used to determine when the Klamath River Recovery Unit is fully contributing to recovery of the Klamath River population segment. vn ACTIONS NEEDED Recovery for bull trout will entail reducing threats to the long-term persistence of populations and their habitats, ensuring the security of multiple interacting groups of bull trout, and providing habitat and access to conditions that allow for the expression of various life history forms. The seven categories are listed in Chapter 1; tasks specific to this recovery unit are provided in this chapter. ESTIMATED COST OF RECOVERY Total cost of bull trout recovery in the Klamath River Recovery Unit is estimated at about $26 million spread over a 25-year recovery period. Successful recovery of bull trout in the recovery unit is contingent on removing threats from nonnative species, eliminating barriers to fish movement, and improving habitat conditions within the Klamath River basin. Total cost includes estimates of expenditures by local, Tribal, State, and Federal governments and by private business and individuals. Cost estimates are not provided for tasks which are normal agency responsibilities under existing authorities. The estimated costs are attributed to bull trout conservation, but other aquatic species will also benefit. ESTIMATED DATE OF RECOVERY Time required to achieve recovery depends on bull trout status, factors affecting bull trout, implementation and effectiveness of recovery tasks, and responses to recovery tasks. A tremendous amount of work will be required to restore impaired habitat, reconnect habitat, and eliminate threats from nonnative species. Three to five bull trout generations (15 to 25 years), or possibly longer, may be necessary before identified threats to the species can be significantly reduced and bull trout can be considered eligible for delisting. vin Title: Bull Trout, Salvelinus Confluentus... Draft Recovery Plan, Chapter 2, Klamath River Recovery Unit...U.S. Department Of The Interior Year: 2008, 2005 KLAMATH RIVER RECOVERY UNIT CHAPTER OF THE BULL TROUT RECOVERY PLAN EXECUTIVE SUMMARY CURRENT SPECIES STATUS Klamath River bull trout were listed as a distinct population segment in 1998 (63 FR 31647) because they are physically isolated from other bull trout by the Pacific Ocean and several small mountain ranges in central Oregon. Recovery of bull trout in the Klamath River Recovery Unit, which includes three core areas and nine currently identified local populations, will require cooperation from Federal, State, and local agencies, and Tribal and private entities. Within the Klamath River Recovery Unit, abundance has been severely reduced and remaining populations are fragmented. HABITAT REQUIREMENTS AND LIMITING FACTORS Watershed disruption has played a major role in the decline of bull trout in the Klamath River basin. The effects of historical land use on fish habitat in the larger tributaries and mainstem rivers of the Klamath River basin have been profound. Channelization, water withdrawals, removal of streamside vegetation, and other disturbances have altered the aquatic environment by elevating water temperatures, reducing water quantity and quality, and increasing sedimentation. Changes in or disruptions to watershed processes that influence characteristics of stream channels have also influenced the dynamics and persistence of bull trout populations. Klamath River basin bull trout are threatened by habitat degradation, past and present land use management practices, agricultural water diversions, and competition or hybridization from normative brown and brook trout. As a result of past land and resource management practices, bull trout populations in the Klamath River Recovery Unit are small, disjunct, and face a high risk of extirpation. IV RECOVERY GOAL AND OBJECTIVES The goal of the bull trout recovery plan is to ensure the long-term persistence of self-sustaining, complex interacting groups of bull trout distributed across the species range, so that the species can be delisted. In order to recover bull trout in the Klamath River, the following objectives need to be met: ? Maintain current distribution of bull trout and restore distribution in previously occupied areas within the Klamath River Recovery Unit, as noted in Appendix A. ? Maintain stable or increasing trends in abundance of bull trout within the Klamath River. This objective includes the expression of all life history strategies including resident, fluvial, and adfluvial forms in the Upper Klamath Lake core area and resident and fluvial forms in the Sycan River and Upper Sprague River core areas. ? Restore and maintain suitable habitat conditions for all bull trout life history stages and strategies. In core areas and migration corridors, stable or upward trends in habitat quality are achieved through landscape-level adjustments in land management strategies designed to maintain and/or enhance structural and functional attributes of upslope, riparian, and fluvial systems. ? Conserve genetic diversity and provide opportunity for interchange of genetic material among appropriate core populations. RECOVERY CRITERIA Recovery criteria for the Klamath River Recovery Unit reflect the stated objectives and consideration of population and habitat characteristics within the recovery unit. Using four population and habitat elements, the Klamath River Recovery Unit Team categorized bull trout into three groups of relative risk: diminished, intermediate, and increased. Team members evaluated bull trout under current and potential recovered conditions based on the number of local populations, adult abundance, population trends and variability, and connectivity of the system. These elements were derived from the best scientific information available concerning bull trout population and habitat requirements. Evaluation of these elements under a recovered condition assumed that actions identified within this chapter had been implemented. 1. Distribution criteria will be met when current distribution of bull trout in the 12 local populations is maintained and distribution is expanded by establishing bull trout in areas identified as suitable for potential local populations. The number of existing local populations by core area are as follows: Upper Klamath Lake, 3; Sycan River, 2; and Upper Sprague River, 7. Achieving criterion 1 entails maintaining existing local populations and establishing additional potential local populations in all core areas in the recovery unit to maintain current and recovered distribution. To achieve criterion 1 and to ensure a core area population of no fewer than 100 adult bull trout, establishing at least 5 to 7 local populations in the Klamath Lake core area among 15 potential local populations (2 to 5 new local populations), at least 5 to 7 local populations in the Sycan River core area from among 15 potential local populations (3 to 5 new local populations), and at least 10 to 12 local populations in the Upper Sprague River core area from among 25 potential local populations (3 to 5 new local populations) is necessary. 2. Abundance criteria will be met when the estimated number of adult bull trout is at least 8,250 individuals distributed among the Upper Klamath Lake, Sycan River, and Upper Sprague River core areas, based on 10 years of monitoring data. 3. Trend criteria will be met when adult bull trout exhibit stable or increasing trends in abundance in the Upper Klamath Lake, Sycan River, and Upper Sprague River core areas, based on 2 generations (10 years) of monitoring data. VI 4. Connectivity criteria will be met when specific barriers to bull trout migration in the Klamath River Recovery Unit have been addressed. In the Klamath River Recovery Unit, this objective means addressing passage: 1) existing culverts that impede passage should be replaced, including those on Threemile Creek at U.S. Forest Service Road 110 crossing, Brownsworth Creek at U.S. Forest Service Road 34 crossing, and Brownsworth Creek both 0.75 mile and 1.25 miles above U.S. Forest Service Road 34; the culvert 0.25 mile below U.S. Forest Service Road 34 (to prevent repeated washout); the large-diameter culvert at the Boulder Creek road crossing; culverts in the upper Sycan River watershed that are identified in the Fremont National Forest inventory; and several in the North Fork Sprague River drainage, namely, on North Fork Sprague River (2), Boulder Creek (1), Dead Cow Creek (1), and Sheepy Creek (1); 2) fish passage structures should be installed at water diversions on bull trout streams, and barriers should be removed, including on Cherry, Sevenmile, Sun, and Threemile Creeks; 3) fish screens should be installed to prevent fish from entering diversion canals or pipes, including on Long, Deming, Threemile, Sun, Sevenmile, and Cherry Creeks; 4) manmade barriers and entrainment should be evaluated and remedied to promote migratory bull trout; priority watersheds include Threemile, Long, Deming, Sevenmile, Cherry, Sun, and Long Creeks. The Klamath River Recovery Unit team expects that the recovery process will be dynamic and will be refined as more information becomes available. Future adaptive management will play a major role in recovery implementation and refinement of recovery criteria. The recovery unit criteria listed above will be used to determine when the Klamath River Recovery Unit is fully contributing to recovery of the Klamath River population segment. vn ACTIONS NEEDED Recovery for bull trout will entail reducing threats to the long-term persistence of populations and their habitats, ensuring the security of multiple interacting groups of bull trout, and providing habitat and access to conditions that allow for the expression of various life history forms. The seven categories are listed in Chapter 1; tasks specific to this recovery unit are provided in this chapter. ESTIMATED COST OF RECOVERY Total cost of bull trout recovery in the Klamath River Recovery Unit is estimated at about $26 million spread over a 25-year recovery period. Successful recovery of bull trout in the recovery unit is contingent on removing threats from nonnative species, eliminating barriers to fish movement, and improving habitat conditions within the Klamath River basin. Total cost includes estimates of expenditures by local, Tribal, State, and Federal governments and by private business and individuals. Cost estimates are not provided for tasks which are normal agency responsibilities under existing authorities. The estimated costs are attributed to bull trout conservation, but other aquatic species will also benefit. ESTIMATED DATE OF RECOVERY Time required to achieve recovery depends on bull trout status, factors affecting bull trout, implementation and effectiveness of recovery tasks, and responses to recovery tasks. A tremendous amount of work will be required to restore impaired habitat, reconnect habitat, and eliminate threats from nonnative species. Three to five bull trout generations (15 to 25 years), or possibly longer, may be necessary before identified threats to the species can be significantly reduced and bull trout can be considered eligible for delisting. vin Close

• 12. [Image] Federal Register - Endangered and Threatened Wildlife and Plants; Designation of Critical Habitat for the Klamath River and Columbia River Populations of Bull Trout

  	We, the U.S. Fish and Wildlife Service (Service), designate critical habitat for the Klamath River and Columbia River populations of bull trout {Salvelinus confluentus) pursuant to the Endangered Species ...
  	Citation × Citation Citation Abstract Copy Title: Federal Register - Endangered and Threatened Wildlife and Plants; Designation of Critical Habitat for the Klamath River and Columbia River Populations of Bull Trout Year: 2004, 2008, 2005 We, the U.S. Fish and Wildlife Service (Service), designate critical habitat for the Klamath River and Columbia River populations of bull trout {Salvelinus confluentus) pursuant to the Endangered Species Act of 1973, as amended (Act). For the Klamath River and Columbia River populations of bull trout, the critical habitat designation includes approximately 1,748 miles (mi) (2,813 kilometers (km)) of streams and 61,235 acres (ac) (24,781 hectares (ha)) of lakes and marshes. We solicited data and comments from the public on all aspects of the proposed rule, including data on economic and other impacts of the designation Title: Federal Register - Endangered and Threatened Wildlife and Plants; Designation of Critical Habitat for the Klamath River and Columbia River Populations of Bull Trout Year: 2004, 2008, 2005 We, the U.S. Fish and Wildlife Service (Service), designate critical habitat for the Klamath River and Columbia River populations of bull trout {Salvelinus confluentus) pursuant to the Endangered Species Act of 1973, as amended (Act). For the Klamath River and Columbia River populations of bull trout, the critical habitat designation includes approximately 1,748 miles (mi) (2,813 kilometers (km)) of streams and 61,235 acres (ac) (24,781 hectares (ha)) of lakes and marshes. We solicited data and comments from the public on all aspects of the proposed rule, including data on economic and other impacts of the designation Close

• 13. [Image] Managing bull trout : the role of electrofishing injury in streams of Crater Lake National Park

  	ill., map; Thesis (M.M.A.)--University of Washington, 1997; Vita; Includes bibliographical references (leaves [35]-38)
  	Citation × Citation Citation Abstract Copy Title: Managing bull trout : the role of electrofishing injury in streams of Crater Lake National Park Author: Mahoney, Brian D. Year: 1997, 2009 ill., map; Thesis (M.M.A.)--University of Washington, 1997; Vita; Includes bibliographical references (leaves [35]-38) Title: Managing bull trout : the role of electrofishing injury in streams of Crater Lake National Park Author: Mahoney, Brian D. Year: 1997, 2009 ill., map; Thesis (M.M.A.)--University of Washington, 1997; Vita; Includes bibliographical references (leaves [35]-38) Close

• 14. [Image] Fishes and stream habitat in tributaries of the Klamath River in Crater Lake National Park, with special reference to the Sun Creek Bull Trout (Salvelinus confluentus) population

  	"December 1993."; "NPS D-155."; Other agencies: Oregon Department of Fish and Wildlife; National Biological Survey, Cooperative Park Studies Unit, College of Forestry, Oregon State University; Includes ...
  	Citation × Citation Citation Abstract Copy Title: Fishes and stream habitat in tributaries of the Klamath River in Crater Lake National Park, with special reference to the Sun Creek Bull Trout (Salvelinus confluentus) population Author: Dambacher, Jeffrey M; Buktenica, Mark W; Larson, Gary L Year: 1993, 2007, 2005 "December 1993."; "NPS D-155."; Other agencies: Oregon Department of Fish and Wildlife; National Biological Survey, Cooperative Park Studies Unit, College of Forestry, Oregon State University; Includes bibliographical references (p. 44) Title: Fishes and stream habitat in tributaries of the Klamath River in Crater Lake National Park, with special reference to the Sun Creek Bull Trout (Salvelinus confluentus) population Author: Dambacher, Jeffrey M; Buktenica, Mark W; Larson, Gary L Year: 1993, 2007, 2005 "December 1993."; "NPS D-155."; Other agencies: Oregon Department of Fish and Wildlife; National Biological Survey, Cooperative Park Studies Unit, College of Forestry, Oregon State University; Includes bibliographical references (p. 44) Close

• 15. [Image] The Water Report - Critical habitat, bull trout and politics

  	Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. Includes bibliographical references. See the full report at http://www.thewaterreport.com/
  	Citation × Citation Citation Abstract Copy Title: The Water Report - Critical habitat, bull trout and politics Author: Envirotech Publications Year: 2005, 2008, 2006 Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. Includes bibliographical references. See the full report at http://www.thewaterreport.com/ Title: The Water Report - Critical habitat, bull trout and politics Author: Envirotech Publications Year: 2005, 2008, 2006 Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. Includes bibliographical references. See the full report at http://www.thewaterreport.com/ Close

• 16. [Image] The Water Report - USFWS to conduct bull trout review ID, MT, OR, WA: groups criticize censored analysis

  	Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. See the full report at http://www.thewaterreport.com/
  	Citation × Citation Citation Abstract Copy Title: The Water Report - USFWS to conduct bull trout review ID, MT, OR, WA: groups criticize censored analysis Author: Envirotech Publications Year: 2004, 2008, 2006 Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. See the full report at http://www.thewaterreport.com/ Title: The Water Report - USFWS to conduct bull trout review ID, MT, OR, WA: groups criticize censored analysis Author: Envirotech Publications Year: 2004, 2008, 2006 Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. See the full report at http://www.thewaterreport.com/ Close

• 17. [Image] Federal Register - Endangered and Threatened Wildlife and Plants; Designation of Critical Habitat for the Bull Trout; Final Rule

  	SUMMARY: We, the U.S. Fish and Wildlife Service (Service), designate critical habitat for the Klamath River, Columbia River, Jarbidge River, Coastal-Puget Sound, and Saint Mary-Belly River populations ...
  	Citation × Citation Citation Abstract Copy Title: Federal Register - Endangered and Threatened Wildlife and Plants; Designation of Critical Habitat for the Bull Trout; Final Rule Year: 2005, 2008 SUMMARY: We, the U.S. Fish and Wildlife Service (Service), designate critical habitat for the Klamath River, Columbia River, Jarbidge River, Coastal-Puget Sound, and Saint Mary-Belly River populations of bull trout (Salvelinus confluentus) in the coterminous United States pursuant to the Endangered Species Act of 1973, as amended (Act). This final designation totals approximately 3,828 miles (mi) (6,161 kilometers (km) of streams, 143,218 acres (ac) (57,958 hectares (ha) of Jakes in Idaho, Montana, Oregon, and Washington, and 985 mi (1,585 km) of shoreline paralleling marine habitat in Washington. We solicited data and comments from the public on all aspects of the proposed rides, including data on economic and other impacts of the designations Title: Federal Register - Endangered and Threatened Wildlife and Plants; Designation of Critical Habitat for the Bull Trout; Final Rule Year: 2005, 2008 SUMMARY: We, the U.S. Fish and Wildlife Service (Service), designate critical habitat for the Klamath River, Columbia River, Jarbidge River, Coastal-Puget Sound, and Saint Mary-Belly River populations of bull trout (Salvelinus confluentus) in the coterminous United States pursuant to the Endangered Species Act of 1973, as amended (Act). This final designation totals approximately 3,828 miles (mi) (6,161 kilometers (km) of streams, 143,218 acres (ac) (57,958 hectares (ha) of Jakes in Idaho, Montana, Oregon, and Washington, and 985 mi (1,585 km) of shoreline paralleling marine habitat in Washington. We solicited data and comments from the public on all aspects of the proposed rides, including data on economic and other impacts of the designations Close

• 18. [Image] The Water Report - Bull trout: critical habitat

  	Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. See the full report at http://www.thewaterreport.com/
  	Citation × Citation Citation Abstract Copy Title: The Water Report - Bull trout: critical habitat Author: Envirotech Publications Year: 2004, 2008, 2006 Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. See the full report at http://www.thewaterreport.com/ Title: The Water Report - Bull trout: critical habitat Author: Envirotech Publications Year: 2004, 2008, 2006 Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. See the full report at http://www.thewaterreport.com/ Close

• 19. [Image] Bull trout recovery program for Sun Creek Crater Lake National Park, Oregon

  	ill.; Report title; "Crater Lake National Park RMP Number: CRLA N-016.101." - P. 1.; Includes bibliographic references
  	Citation × Citation Citation Abstract Copy Title: Bull trout recovery program for Sun Creek Crater Lake National Park, Oregon Author: Buktenica, Mark Year: 2010 ill.; Report title; "Crater Lake National Park RMP Number: CRLA N-016.101." - P. 1.; Includes bibliographic references Title: Bull trout recovery program for Sun Creek Crater Lake National Park, Oregon Author: Buktenica, Mark Year: 2010 ill.; Report title; "Crater Lake National Park RMP Number: CRLA N-016.101." - P. 1.; Includes bibliographic references Close

• 20. [Image] The growth of trout and salmon in Crater Lake, Oregon and its bearing on fish management

  	Citation × Citation Citation Abstract Copy Title: The growth of trout and salmon in Crater Lake, Oregon and its bearing on fish management Author: United States. National Park Service Year: 1938, 2010 Title: The growth of trout and salmon in Crater Lake, Oregon and its bearing on fish management Author: United States. National Park Service Year: 1938, 2010 Close